Improvement in heat-governors for stoves



A. H. TINGLEY.

Heat Governor for Stoves.

Patented Avpril 5, 1864.

N. PEYEHS. Phnmuuwgnpher. wnshingwnfnrc.

ALBERT H. TINGLEY, OF PROVIDENCE, RHODE ISLAND..

IMPROVEMENT IN4 HEAT-GOVERNOPLS FOR STOVES.

Specilieation forming part of Letters Patent No. 112,240, dated April 5, 1864 antedated March 30, 1864.

ings, making a part ot' this specification, in

Figure l is a side sectional view of my invention, taken in the line c Fig. 2. Fig. 2 is an enlarged sectional view of a portion of the same, taken in the line y y, Fig. 3; Fig. 3, an enlarged vertical section al view of a portion of the same, taken in the line z' z, Fig. 4;-

Fig. 4., a face or front view of Fig. 3; Fig. 5, a vertical section of a portion of the same, taken in the line w w', Fig. 6 5 Fig. 6, a hori- Zontal section of the same, taken in the line y y', Fig. 5, Fig. 7, a horizontal section of the saine, taken in the line z z, Fig. 5; Fig. 8, a diminished view of the same applied to a hotair furnace.

Similar lettersof reference indicate corresponding parts in the several figures.

The object of this invention is to ob'tain a simple and efficient self-,acting heat-governor for stoves and hot-air furnaces, one which will admit of being adjusted in such a manner as to govern the heat according to the state or temperature of the weather, and which may be adjusted properly to thus act or operate by any person of ordinary ability; and also to obtain a method by which the escape of the gases from the consuming fuel to the apartments warmed may be always effectually prevented.

To enable others skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a tube, the lower end of which is secured on the upper end of a box, B, of nearly cylindrical form, and having two openings, a c', at opposite sides of it, said openings being provided with flan ges b, which encompass them, and one opening, a, communieating with the ash-box of the furnace, and the other opening, c', communicating with a pipe which leads into the smoke-pipe of the furnace, as shown in Fig.- 8.

To the upper end of the tube A there is attached an upright plate, C, and a box, D, is also placed on the upper end oi said tube, the plate C forming the back of the box, as shown clearly in Fig. l.

To the upper end of the plate G there is attached a hub or projection, E, said hub or projection extending laterally out from the back of plate O, and having two zinc tubes, F F, attached permanently to it, one directly over the other. The opposite ends of these zinc tubes are permanently attached to a plate, G, and within each tube there is placed a steel rod, H. These rods both pass through the plate G and are connected by screws c to a lever-plate, I, the fulcruin of which is formed by two screws, d d, which pass through ears e e at the back of plate G, and into the sides of the lever-plate I, as shown clearly in Fig. 2. The screws d d, which connect the steel rods H to the lever-plate I, pass laterally into said lever-plate and tit in recesses in the sides of the rods H, as also shown in Fig. 2. The rod H in the upper zinc tube, F, has its front end permanently attached to the projection E, as shown atfin Fig. l but the rod H in the lower tube, F, passes through the. hub or projection E, and is connected to the upper part of a lever, J, which is attached by afulcrumpin, g, to a horizontal projection, h, at the upper part of the plate G. (See Fig. l.) The lower end of the lever J is forked and between its prongs i there is inserted the vertical part j of an inverted T-shaped bar, K, said part j having a screw, k, passing through it, the rod on which said screw is out passing through the prongs t' i, as shown clearly in- Fig. 3. The lower and horizontal part, l, of the bar K has a curved recess, m, made in its under side, as shown in Figs. 1 and 3. A

Within the tube A there is ittecl a rod, L, the upper end of which is connected by a pivot, n, to an arm, M, which is fitted on an shaft, o, placed in bearings p, attached to the plate O. This arm M is acted upon by a spring, q, which has a tendency to keep the rod L elevated to its fullest extent. In the upper end of the rod L there is placed aroller, r,which the spring q keeps in contact with the part l of the bar K, as will be fully un# derstood by referring to Figs. 1 and 3.

Within the box B, at the lower end of the tube A, there is fitted a valve, N, which is of curved form and may be described as being a segment of a hollow cylinder, placed in an upright position. This valve has two radial arms, ss, attached to it, through the inner parts of which screws t t pass, one screw passing into a plate, u, which is secured to the bottom of the box B, and the other entering a similar plate, u', which is secured to a partition-plate, c, in said box. These plates a u are connected at their outer ends at each side by upright bars w. By this arrangement the valve N may be very readily adjusted within its box B. The rod L passes through a curved slot a* in the horizontal partition-plate c and the upper plate, u', and through an opening in the upper arm, s, of the valve N. (See Figs. 5 and 6.)

In the box B, adjoining or by the side of the openinga,therearemadeopeningsb. (Shown in:Fig.] These openings form a communicatzon between the. box B and the external air, and the valve N works over and closes these openings a b', the latter being closed as the former are opened, and vice versa.

O is a guard-plate fitted in-the box B, directly behind the valve N, and the latter has a horizontal slot, c', made in it to allow the valve to work over the partition-plate fv.

rlhe compartment in the box B above the partition-plate c may communicate either with the smoke-pipe of the stove or furnace, or with the fire-chamber. It is designed to be used separately or in connection with thelower t part of the box, as may be desired, one valve being only required for the two compartments.

P represents an arbor which passes through the front of box D and into the front end of thc screw-shaft lc, thc inner end of the arbor P being` made flat or square, so as to be capable of turning the screw-shaft 7c. To the outer end of this'arbor P there is attached an index, Q, which traverses over a graduated dial, R, on the face or front of box D, and on the arbor P there is placed a plate, S, which is also graduated or provided with points, as shown clearly in Fig. 4, and which may be turned and secured at any desired point by any proper fastening.

The operation is as follows: rlhe zinc tubes F F are inserted in the upper part of the airheating chamber of a hot-air furnace directly over the latter, and, as zinc expands and contracts in a much greater degree than steel, it will be seen that the tubes F will, in expanding, cause the steel rod H in the lower zinc tube, F, to actuate the leverJ in the direction indicated by the arrow l, and thisleverJ will, in consequence of being connected to the rod L, through the medium of the roller r and the curved recess m in the part l of the bar K, move the rod L so that the latter will actuate the valve N and carne the same to close or pass over the openings b in box B and open the opening ed, thereby cutting off or diminishing the supply of air to the ash-box, and consequently to the ire in the furnace,

and at the same time affording a communication between the ash-box and smoke-pipe, thereby diminishing the intensity of the re and economizing in fuel, and without checking the escape of gas up the smoke-pipe, a contingency which occurs in a greater or less degree when the ordinary damper Vor ventilatorv the openings b will be uncovered or opened and the opening a closed, thereby admitting air into the ash-box to supply the tire with oxygen, and cutting oi the communication between the ash-box and the smoke-pipe. The advantage of this arrangement ofthe damper may be summed up as follows: There being no damper or ventilator to the smokepipe by which the draft is sensibly governed, there is always a partial vacuum maintained inside of the stove or heater to the furnace,

thus effectually preventing the egress of the gases from the burning fuel to the surrounding air through the cracks or crevices of the stove or heater. The fire may bekeptat alow er state'of temperature and at least last one-third longer, as a part of the leakage through the ash-doors, which would go to supply combustion, passes throughthe more direct way of the counterdraft to the chimney or smoke-pipe thus preventing too much heat and a waste of coal, a desideratum inmoderate weather. When the roller r is tted directly into the recess m of the part l of the bar K, the rod L and valve N will be. moved simultaneously with the lever J; but when this movement is too quick or sensitive, as in extreme cold weather, for instance, or when a great amount of heat is required, the bar K is adjusted by turning the index Q, so that the recess m will be out of line or in front of the roller r, and thereby admit of a considerable movement of lever J before the rod L and valve N will be operated. (See Fig. 3, in which this adjustment of bar K is shown in red outline.) rlhe graduated dial R serves as a guide in thus adjusting the bar K and enables the operator to adjust the bar K so as to govern the heat as may be desired, the graduating on the dial It corresponding to those of a Fahrenheit thermometer, indicating the degrees Aof tempera` to the word cold77 when the weather is cold, mild when the weather is rnild, &c., the initials or contractions of these words being marked upon the plate.

Although the tubes F are described as being of zinc and the rods H of steel, still other metals may be used which vary suiciently in expanding and contracting properties.

The plate C, hub F, and lever-plate I may be of brass.

In consequence of having two tubes, F F, and two rods, H H, the latter being connected, as shown, I economize in space and obtain a sufficient movement of the lever J. One tube, F, and one rod, H, could be made to answer, it' of sufiicient length. In most cases, however, they could not be conveniently applied in that way. By this arrangement the valve N is operated by the expansion and contraction of different metals alone, no weights or counterpoises being required in any way. The valve also, in consequence of being hung and arranged as shown, operates freely or with but little friction, and the manner of connecting the two steel rods, H H, is extremely simple and admits of.' the latter operating in a perfect manner.

Having thus described my invention, what Iclaim as new, and desire to secure by Letters Patent, is

1. The expansion tube or tubes F and their inelosed rods H, in connection with a lever, J, or any equivalent device for operating a valve or damper, N, for the purpose specied,

by which the latter is adjusted solely by the expansion and contraction of the tubes F, no counterpoise or Weight being employed.

2. The lever-plate I, connecting the two rods H H, when used in connection with the tubes F, for the purpose specified.

3. The adjustable bar K, or its equivalent, interposed between the lever J and rod L, for the purpose of controlling the action of said lever on the rod L and valve N, as set forth.

4 The employment or use ofthe valve N ,inter` posed between the ash-box and a passage communicating with the smoke-pipe, and placed within a suitable box, B, provided with openings b, substantially as shown, or in any equivalent way, to operate as set forth.

5. Placing the arm s s of the valve between the plates u u', substantially as shown, for the purpose of facilitating the adjusting of the valve N in the box B.

6. Adjusting the bar K through the medium of the arbor I), index Q, and graduated dial R, as set forth.

7. The adjustable plate S, placed on the arbor I), when used in connection with the index Q, as and for the purpose specified.

8. The partition plate a in the valve-box B, in connection with the slot c in the valve N, whereby one valve is made to answer for both compartments of the box B, as set forth.

ALBERT H. TINGLEY.

Witnesses WILLARD CHAGE, SrLvANUs TINGLEY. 

